104 E. G. PICKELS 



70. McKinstry, D. W., H. M. Terrill, E. H. Reading, and K. V. Huffman, 



J. Franklin Inst., 238, 310 (1944) (poliomyelitis virus). 



71 . Taylor, A. R., D. G. Sharp, H. Finkelstein, D. Beard, and J. W. Beard, 



Proc. Soc. Exptl. Biol. Med., 43, 648 (1940) (normal tissue compo- 

 nents). 



72. Taylor, A. R., D. G. Sharp, I. W. McLean, Jr., D. Beard, J. W. Beard, 



J. H. Dingle, and A. E. Feller, J. Immunol., 48, 361 (1944) (swine in- 

 fluenza virus). 



73. Mcintosh, J., and F. R. Selbie, Brit. J. Exptl. Pathol., 21, 153 (1940) 



(adaptation of continuous flow centrifuge for virus concentration). 



74. Stanley, W. M., J. Immunol., 53, 179 (1946) (efficiency of continuous 



flow centrifuges). 



75. Taylor, A. R., J. Biol. Chem., 163, 283 (1946) (papilloma virus in continu- 



ous flow centrifuge). 



QUANTITATIVE METHODS BASED ON SAMPLING 



76. Pickels, E. G., J. Gen. Pht/sioL, 26, 341 (1943) (study of sedimentation 



in angle centrifuges). 



77. Tiselius, A., K. Pedersen, and T. Svedberg, Nature, 140, 848 (1937) 



(separation cell for analytical ultracentrifuge). 



78. Curnen, E. C, E. G. Pickels, and F. L. Horsfall, /. Exptl. Med., 85, 



23 (1947) (pneumonia virus in angle centrifuge). 



79. Hughes, T. P., E. G. Pickels, and F. L. Horsfall, J. Exptl. Med., 67, 



941 (1938) (sampling technique, angle centrifuge). 



80. Elford, W. J., and I. A. Galloway, Brit. J. Exptl. Pathol., 18, 155 (1937) 



("inverted capillary" method). 



81 . Ruben, S., M. D. Kamen, and L. H. Perry, J. Am. Chem. Soc, 62, 3450 



(1940) (application of "spinning top"). 



MISCELLANEOUS 



82. Stokes, G. G., Mathematical and Physical Papers, Vol. Ill, Cambridge 



Univ. Press, Cambridge, 1901, pp. 59-60 (Stokes formula for spherical 

 particles) . 



83. Kraemer, E. 0., J. Franklin Inst., 229, 393 (1940) (efl'ect of solvation). 



84. Herzog, R. 0., R. Illig, and H. Kudar, Z. physik. Chem., A167, 329 



(1933) (effect of particle shape). 



85. Tiselius, A., Kolloid-Z., 59, 306 (1932) (suppression of Donnan effect). 



86. Mosimann, H., and R. Signer, Helv. Chim. Acta, 27, 1123 (1944) (effect 



of hydrostatic pressure on viscosity and density). 



87. Claesson, S., Nature, 158, 834 (1946) (diffusion cell). 



88. Neurath, H., Chem. Revs., 30, 357 (1942) (diffusion constant determina- 



tions). 



